Improvement in stop-valves



NrTED STATES PATENT OFFICE.

JOHN MCOLELLAND, OF WASHINGTON, DISTRICT OF COLUMBIA.

IMPROVEMENT IN STOP-VALVES.

h Specieation forming part of Letters Patent No. 46,571, dated February28, 1865.

To all whom. it may concern:

n Be it known that I, J oHN MCCLELLAND, of the city and county ofWashington, in the District of Oolumbia,have invented certain new anduseful Improvements in Stop-Valves for Branch and Main Pipes and theMode of Constructing the Same; and the following is a full, clear, andexact description ofthe same, reference being had to the accompanyingdrawings, making a part of this specification, in which- Figure lrepresents a vertical section with the valve closed cut through thecenter. Fig. 2 shows the cone valve with gun-metal rings for bearings,detached.

The object of my invention is to supply a stop-valve or cut'ot't'iorbranch or water mains that will not choke with stones or gravel, so asto prevent it being easily closed, and one that will entirely shut oft'the liow ot' water.

My invention consists in making a hollow k cone-valve, the inverted cupor hollow being i,

position or gun metal in tue following manner: I first cast the rings aa a a, they being so shaped as to fit the curve of the valve D. Theportion of them which is within the cir- Acumference of the valve ismade doy'etailing, the mold being made for casting the cup or body ofthe valve D of iron. The bronze rings A a a a a are placed in the-mold'and the, iron is cast onto them, thus securing them rmly in their placeson the periphery of the valve, where they may be hammered to give themsolidity and close up the pores of the metal before they are turned oft'and ground in to tit` their seat. The casting for the valve D need notbe of great thickness to give them sufficient strength, as they arestrengthened by the gun-metal rings a a a a, and are supported on allsides when screwed down to their bearings. I make them open at thebottom h It, they having a large cavity underneath, into which anystone, gravel, or hard substance may be admitted which could possiblyget into the valves through the pipes B B, so as to prevent the valvefrom being screwed down so as to close up the branch mains.l

lt is believed that it is from this cause in very many instances thatstop-valves (as they have been heretofore made) have failed to operateto shut oft' the water, and violence being used, or more force appliedto the screw than it could bear, they often became so much damaged thatthey have to be taken up for repairs or new ones put in their places. ltwill readily be seen that b v my mode of constructing the valves, asabove described, all difticulties of that kind willbe ettbctuallyremedied.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. The hollow sliding stop-valve, open at the bottom, the same beingconstructed and operatin g inthe manner described, for the purposesherein set forth.

2. In combination therewith, the rings a, constructed substantially asdescribed.

3. ln combination with the invention claimed in the firstclause, therings a, applied substantially as described.

JOHN MCCLELLAND.

ot larger dimensions than the bore of the pipes, so that it will inclosein or under the valve any substance that can pass into it through anoritice; also in the mode of inserting and securing gun metal rings inthe valve for bt arings.

To enable others skilled in the art to make and use my inv ntion, I willdescribe it more fully, referring to the drawings, and to the letters ofreference marked thereon.

The casting A A, ot which the outer portion ofthe stop-valve is formed,may have four (more or less) sockets, B B, for branch pipes. The cavityO O, in which the cone-shaped valve l D is placed, is closed at the topby a head,

E, with bolts and nuts c e. Through the center ofthe head E is suspendedthe screw F which operates the cone valve D to open and close the same,it having its nut or female screw in the top of the valve, by which itis raised to open the passa-ge in the mains to all of the branches, andcan be forced into its seat by reversing the screw F to cut oli' the j/ilow. The head fof the screw is fitted to be turned by a wrench or key,and is prevented from leakage where it comes up through the l head F bya stuffing-box, b b. The cone-shaped valve D is kept from turning andguided centrally in its movements by ears c c, fitting in 1 verticalgrooves d d. f I` make my improved stop-valve for the purposes hereindescribed of cast-iron and com- Witnesses:

J. B. WOODRUFF, J oHN S. HoLLINGsHEAD.

